/**
 * Copyright (C) 2008 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package net.hasor.web.binder;
import java.io.IOException;
import java.util.Map;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.hasor.web.WebAppContext;
import net.hasor.web.WebModule;
/**
 * An internal dispatcher for guice-servlet registered servlets and filters.
 * By default, we assume a Guice 1.0 style servlet module is in play. In other
 * words, we dispatch directly to the web.xml pipeline after setting up scopes.
 *
 * <p>
 * If on the other hand, {@link WebModule} is used to register managed
 * servlets and/or filters, then a different pipeline is bound instead. Which,
 * after dispatching to Guice-injected filters and servlets continues to the web.xml
 * pipeline (if necessary).
 *
 * @author dhanji@gmail.com (Dhanji R. Prasanna)
 */
public interface FilterPipeline {
    /**初始化管道 F*/
    public void initPipeline(WebAppContext appContext, Map<String, String> filterConfig) throws ServletException;

    /**执行请求操作*/
    public void dispatch(HttpServletRequest request, HttpServletResponse response, FilterChain defaultFilterChain) throws IOException, ServletException;

    /**销毁管道*/
    public void destroyPipeline(WebAppContext appContext);
}